package com.jincheng.system.service.impl;

import com.jincheng.common.constant.UserConstants;
import com.jincheng.common.core.domain.TreeSelect;
import com.jincheng.common.core.domain.entity.SysDept;
import com.jincheng.common.core.domain.entity.SysDictData;
import com.jincheng.common.core.domain.entity.SysRole;
import com.jincheng.common.core.domain.entity.SysUser;
import com.jincheng.common.core.text.Convert;
import com.jincheng.common.exception.ServiceException;
import com.jincheng.common.utils.SecurityUtils;
import com.jincheng.common.utils.StringUtils;
import com.jincheng.system.domain.dto.DeptStatisticsDTO;
import com.jincheng.system.domain.dto.LineBarChartDTO;
import com.jincheng.system.mapper.SysDeptMapper;
import com.jincheng.system.service.ISysDeptService;
import com.jincheng.system.service.ISysDictDataService;
import com.jincheng.system.service.ISysRoleService;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

/**
 * 部门管理 服务实现
 *
 * @author DairyJay
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService {
    private final SysDeptMapper deptMapper;

    private final ISysRoleService roleService;
    private final ISysDictDataService dictDataService;

    public SysDeptServiceImpl(SysDeptMapper deptMapper, ISysRoleService roleService, ISysDictDataService dictDataService) {
        this.deptMapper = deptMapper;
        this.roleService = roleService;
        this.dictDataService = dictDataService;
    }

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
//    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept) {
        return deptMapper.selectDeptList(dept);
    }

    /**
     * 查询一级部门信息
     *
     * @return 一级部门信息
     */
    @Override
    public List<Map<String, Object>> selectDeptStairOptions() {
        SysDept sysDept = new SysDept();
        sysDept.setParentId(1L);
        List<SysDept> depts = deptMapper.selectDeptList(sysDept);
        return new ArrayList<>(depts.stream()
                .map(dept -> {
                    Map<String, Object> option = new HashMap<>();
                    option.put("label", dept.getDeptName());
                    option.put("value", dept.getDeptId());
                    return option;
                })
                .toList());
    }

    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept) {
//        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        List<SysDept> depts = selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts) {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).toList();
        for (SysDept dept : depts) {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId())) {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty()) {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     *
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts) {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     *
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId) {
        SysRole role = roleService.selectRoleById(roleId);
        return deptMapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
    }

    /**
     * 根据用户ID查询部门树信息
     *
     * @return 部门树列表
     */
    @Override
    public List<String> selectDeptNameListByUserId() {
        SysUser user = SecurityUtils.getLoginUser().getUser();
        if (user.getDept() == null) {
            return List.of();
        }
        String ancestors = user.getDept().getAncestors();
        List<String> ancestorList = new ArrayList<>(Arrays.asList(ancestors.split(",")));
        String string = user.getDeptId().toString();
        ancestorList.add(string);
        return deptMapper.selectDeptNameListByUserId(ancestorList);
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId) {
        return deptMapper.selectDeptById(deptId);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public int selectNormalChildrenDeptById(Long deptId) {
        return deptMapper.selectNormalChildrenDeptById(deptId);
    }


    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId) {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }


    /**
     * 查询部门A是否是部门B的子部门
     *
     * @param parentId 父部门id
     * @param deptId   子部门id
     * @return 是否存在父子关系
     */
    @Override
    public boolean checkDeptChildByDeptId(Long parentId, Long deptId) {
        SysDept sysDept = selectDeptById(deptId);
        String[] split = sysDept.getAncestors().split(",");
        // 查看deptId是否在split中
        for (String s : split) {
            if (s.equals(String.valueOf(parentId))) {
                return true;
            }
        }
        return false;
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId) {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept) {
        Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue()) {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId) {
        if (!SysUser.isSuperAdmin(SecurityUtils.getUserId()) && StringUtils.isNotNull(deptId)) {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
//            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            List<SysDept> depts = selectDeptList(dept);
            if (StringUtils.isEmpty(depts)) {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept) {
        SysDept info = deptMapper.selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus())) {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        int affectedRows = deptMapper.insert(dept);

        // 新增部门成功，则插入字典数据
        if (affectedRows > 0 && dept.getParentId() == 1) {
            SysDictData dictData = new SysDictData();
            dictData.setDictType("sys_dept");
            dictData.setDictValue(String.valueOf(dept.getDeptId()));
            dictData.setDictLabel(dept.getDeptName());
            dictData.setDictSort(0L);
            dictData.setListClass("default");
            dictData.setCreateBy(dept.getCreateBy());
            dictData.setCreateTime(dept.getCreateTime());
            dictDataService.insertDictData(dictData);
        }
        return affectedRows;
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDept dept) {
        SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
        SysDept oldDept = deptMapper.selectDeptById(dept.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept)) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors())) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }

        // 如果学院名称修改了则更新字典数据
        if (result > 0 && dept.getParentId() == 1) {
            SysDictData dictData = dictDataService.selectDictDataByTypeAndValue("sys_dept", String.valueOf(dept.getDeptId()));
            if (StringUtils.isNotEmpty(dept.getDeptName())
                    && !StringUtils.equals(dept.getDeptName(), dictData.getDictLabel())){
                dictData.setDictLabel(dept.getDeptName());
                dictDataService.updateDictData(dictData);
            }
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept) {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDept child : children) {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (!children.isEmpty()) {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId) {
        SysDept dept = deptMapper.selectDeptById(deptId);
        int affectedRows = deptMapper.deleteDeptById(deptId);
        if (affectedRows > 0 && dept.getParentId() == 1) {
            SysDictData dictData = dictDataService.selectDictDataByTypeAndValue("sys_dept", String.valueOf(deptId));
            if (dictData != null) {
                dictDataService.deleteDictDataByIds(new Long[]{dictData.getDictCode()});
            }
        }
        return affectedRows;
    }

    /**
     * 获取部门统计信息
     *
     * @return 部门统计信息
     */
    @Override
    public LineBarChartDTO selectDeptStatistics() {
        List<DeptStatisticsDTO> deptStatisticsDTOList = deptMapper.selectDeptStatistics();
        LineBarChartDTO lineBarChartDTO = new LineBarChartDTO();
        List<String> xAxisData = deptStatisticsDTOList.stream().map(DeptStatisticsDTO::getDeptName).toList();
        List<Integer> seriesData = deptStatisticsDTOList.stream().map(DeptStatisticsDTO::getUserCount).toList();
        lineBarChartDTO.setXAxisData(xAxisData);
        lineBarChartDTO.setSeriesData(seriesData);
        return lineBarChartDTO;
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t) {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList) {
            if (hasChild(list, tChild)) {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t) {
        List<SysDept> tlist = new ArrayList<SysDept>();
        for (SysDept n : list) {
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue()) {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t) {
        return !getChildList(list, t).isEmpty();
    }
}
